import time

    import datetime

    from datetime import date

    import sys

    import os    

    tablename=sys.argv[1]

    backupDst=sys.argv[2]

    today=date.today()

    if today.day == 15:    //every month, we do a full backup

            backupSubFolder=backupDst+today.isoformat()+"-full"

            cmd="hbase org.apache.hadoop.hbase.mapreduce.Export %s %s"%(tablename,backupSubFolder)

    else:    

            yesterday=datetime.date.today()- datetime.timedelta(days=1)

            todayTimeStamp=time.mktime(today.timetuple())

            yesTimeStamp=time.mktime(yesterday.timetuple())

            backupSubFolder=backupDst+today.isoformat()

            cmd="hbase org.apache.hadoop.hbase.mapreduce.Export %s %s %s"%(tablename,backupSubFolder,str(int(todayTimeStamp)*1000)    

    print cmd    

    os.system(cmd)